The thesis researches the influence of marine insurance law on the development of fire and life insurance law in the Dutch Republic (1581-1795). Fire and life insurance are often seen as offspring of marine insurance, following the latter's principles and rules mutatis mutandis. However, this theory of marine insurance as a single starting point for other types of insurance is rebutted by the various mutual fire insurance contracts found in the Zaanstreek and other parts of the Dutch Republic. This study reviews sources already known and hitherto unknown sources. As most of the sources consist of contracts, the research deals with insurance contract law. These contracts were concluded throughout the Dutch Republic at different times by varying parties. Therefore, instead of resorting to a uniform and doctrinal approach, the study takes on a casuistic approach. Instances of fire and life insurance are treated on a case-by-case basis within their own relevant circumstances.